Holder for razor blades



i 1945. c. w. CALDWELL I 213793863 50mm Fork RAZOR BLAfiEs Filed May 20,1944 Patented July 10, 1945 HO'LDER roa RAZOR BLADES Charles WilliamCaldwell, Johannesburg, Transvaal, Union of South Africa Application May20, 1944, Serial No. 536,573 (cram-s31) 1 Claim.

This invention relates to holders in which a wafer type razor blade issecured to enable the blade to be stropped or used as aknife.

The object of the invention is to provide such a holder which securesthe blade firmly in position by a simple clamping action. The inventionattains this object by pressing a face of the razor blade against asupporting memberhaving an antislipping surface.

A hand tool adapted to hold a wafer blade for stropping by handoperationis shown in the accompanying drawing in which I Figure I is aperspectiveview of the holder with the blade clamped "therein.

Figure II shows the holder open for receiving or removing the blade. 1 II Figure III is a cross section on IIIIII Figure I drawn to an enlargedscale.

The holder comprises a fixed clamp jaw 2 and a movable clamp jaw 3 madeof sheet metal and lying. parallel with one another. rigid with a handle4 and projects from one side thereof; the handle being for instanceinserted into a socket 5 formed by curling a long edge of the jaw 2. Thejaw 3 is pivoted to jaw 2 at 6 The jaw' 2 is merit inits ownplane, theresult would be un-f satisfactory owing to the lowco-eflicient of fric-I tion between said surfaces. I

Accordingly a piece of I double faced. friction I tape H is stuck, byits adhesive lower face, :to.

the inner face of jaw 2, and presents an exposed adhesive face l2 onwhich the blade is laid. The

clamping pressurefperpendicular to the blade faceawithout being of morethan moderate magnitude, causes the blade to embed itself slightly inthe surface l2 and the blade face to adhere to said surface therebysetting up strong tangential frictional resistance to blade movement."This re sistance is effective bothwhile the jaw 3 is being closed andwhile the blade is being stropped or.

used. On the other hand, upon the clamping pressure being removed byopening the jaw there is no. difficulty in lifting the blade 1perpendicularly off the surface I2.

which the back edge M, for the time being, of

The socket 5provides a shoulder I3 against the razor blade may beabutted, ensuring that so that it can be swung open, while remainingparallel with jaw 2 and as shown in Figure II, to

enable therazor blade Tto be laid flat on jaw 2. a

Jaw 3 is retained in its clamping position, Figure 1-, by itsnon-pivoted end 8 being passed under an ear 9 extending from jaw 2. Saidjaw 3 is somewhat bowed in edge view and is capable of elastic bendingendwise, to nsure that it exerts effective clamping pressure centrallyon the razor blade whenits end 8 is retained under ear 9. Its edge In isrounded outward sufficient to ensure its sliding smoothly over the'razor blade while it is being swung to its clamping position.

The construction described provides a desirably thin holder of verysimple form, distinguished by each time a blade of standard width ishoused in the holder, the projection of its outer edge I5 will alwaysbeuniform.

The socket .5, when rested on the strop, en-

sures a constant elevation ofthe back edge [4 of the blade and in.combination with the uniform projection of edge l5 ensures thatthe bevelangle at which the razor edge is presented to the strop,

will also be constant.

having no structural partsfor positively securing or positioning therazor blade, which can accordingly be produced at low cost. However,such materials, e. g. sheet metal, as-are suitableforthe manufacture ofthe jaws are smooth and hard, and if the tangential frictional adhesionbetween the smooth and hard jaw surfaces and the similarly smooth andhard faces of the razor blade we e relied upon to hold the blade againstmove- The piece of tape II is continued over the shoulder l3, to protectthe back blade edge l4 said shoulder.

Iclaim:

from damage by actual contactwith the metal of A razorflblade holdercomprising a handle, a

jaw fixed to said handleand providing an anti.- slipping surface for arazorblade to rest upon and also providing a shoulder for one edge ofthe razor blade to rest against; a movable jaw pivoted to the fixed jawto swing into and out of a position in which it clamps the razor bladeagainst the anti-slipping surface; and means, on the fixed jaw, for soholding saidmovable jaw in its clamping position that said movable jaw,which is initially curved convexly to; the fixed jaw, is elas ticallyflattened against the inserted razor blade.

w CHARLES WILLIAM CALDWELL.

